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Thread: Shaft

  1. #1
    Join Date
    Mar 2006
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    Waikerie SA
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    39

    Default Shaft

    I am just a little confused with terminology, I need to buy some mild steel shaft to fit bearings either 1" or 25mm. what is it called, looking in the yellow pages there is reference to "merchant bar" what is it I am looking for?

  2. #2
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    Jun 2007
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    sydney ( st marys )
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    Default

    When you contact the Steel Merchant or Supplier ask them for 4140 Centreless Ground.

    If its for a shaft it should be High Tensile.

    You will have to confirm what size they have if they dont have both Imperial and Metric in the size you are after or just buy your Bearings to suit the Shaft size.

  3. #3
    Join Date
    Jan 2009
    Location
    Victoria
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    52

    Default Shaft Steel

    Hi Vin,

    Yesterday I called into my local Interlloy agent looking for some advice and ? offcuts.

    Was blown away by the salesperson. Couldn't have been more helpful. I explained my novice status in this area and he provided the advice, showed me through the warehouse and even gave me a couple of charts, with the various steels, ID and usage. Started to make sense of the numbers the old hands rattle off.

    They only deal in machine shop type alloy steels but have every type and shape available. Best of all the local mob will package offcuts of your choice if you can carry it. Locally they do a 100Kg bin.

    I only bought $100 of offcuts of various stuff - that was all the car could carry with my other purchaces...Worked out at about 10% of full length cost I think.

    The bloke was very professional and courteous. Not often you this kind of attitude when shopping for scraps - well done interlloy.

    Vin I think there is a depot in Adelaide = 299 Hanson Road Wingfield 08 8244 7111. Cant guarentee the same response but if they are in your area - worth a visit. (and grab a chart)

    Cheers

    Ian

  4. #4
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    near Rockhampton
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    Default

    Depending on the torque requirement you would really need a high tensile bar for the application...

    What you want is stell with a "bright" finish..The bright refers to the fact is has no scale on it and is ready for immediate use..

    A bright mild steel bar is going to be cheaper then 4140 or 1045..

  5. #5
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    Default

    Dont mount your bearing on a BRIGHT steel bar.

  6. #6
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    Nov 2009
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    australia
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    Default

    Quote Originally Posted by pipeclay View Post
    dont mount your bearing on a bright steel bar.
    why not ?

  7. #7
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    Because it is only Bright steel bar,there is no guarentee of tolerance.

    If they wish to use Bright bar it would be logical to buy oversize and machine to suit the bearing bore,otherwise just buy the Centreless Ground and use as is.
    Last edited by pipeclay; 7th Apr 2010 at 05:33 PM. Reason: more info

  8. #8
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    Aug 2006
    Location
    Melbourne
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    Default

    slightly off topic here, but out of interest here what type of steel would be used for a lathe spindle/shaft?

    Thanks

  9. #9
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    Quote Originally Posted by pipeclay View Post
    Because it is only Bright steel bar,there is no guarentee of tolerance.
    It is usually adequate though and very close to nominal size...Considering we don't yet know the application.... I mean if we wanted to get real technical I could drag out my book that shows in microns the bearing fits for different applications and size and type of bearings..


    I am guessing precision ground shafting is going to be a lot more expensive then the standard as drawn/centreless ground bright stuff you buy..


    Quote Originally Posted by Com_VC View Post
    slightly off topic here, but out of interest here what type of steel would be used for a lathe spindle/shaft?

    Thanks
    Probably 4140 or EN26... It would probably be a high tensile steel capable of being induction hardened...

  10. #10
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    Dec 2009
    Location
    broadford
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    Default

    whats the shaft for? how long etc?

  11. #11
    Join Date
    Mar 2006
    Location
    Waikerie SA
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    39

    Default

    The application is on a very slow (about 50 rpm) drum 600x150 to drive a conveyor belt 2000 long. this is the bottom belt for a compost/manure spreader I am contemplating building.
    Thanks for the replies so far fellas, appreciated

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